The D-curve magnetic release allows coordination with upstream selective MCBs in a distribution board — the 100 mA residual threshold provides earth-fault discrimination ahead of a 30 mA RCD downstream. Type AC residual detection covers the majority of commercial and industrial final circuits; if the load includes VFDs or LED drivers generating pulsed DC faults, a Type A or F RCBO would be the correct choice instead.
Siemens 5SU1424-2RC40 RCBO 40A 2P D curve 100mA
MPN5SU1424-2RC40
Siemens 5SU1424-2RC40 RCBO, 40 A, 2-pole, 4-module, D characteristic, Type AC, 100 mA residual current.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Product details
Frequently asked questions
What does the D characteristic mean on this RCBO?
The D curve provides a magnetic trip threshold of 10 to 20 times the rated current (In), designed for circuits with high inrush such as small motors, transformers, and discharge lighting where a B or C curve would trip on startup.
Where can I buy 5SU1424-2RC40 and get a price?
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an inquiry for a firm quote.
What is the 100 mA Type AC residual rating used for?
The 100 mA sensitivity and Type AC detection (sinusoidal AC only) suit it for general-purpose final circuits where earth leakage protection above 30 mA is acceptable — typically distribution sub-mains, lighting circuits, or equipment where nuisance tripping from capacitive leakage must be avoided.
MPN
5SU1424-2RC40